Embryotoxicity of Corexit 9500 in mallard ducks (Anas platyrhynchos)

Kimberly J. Wooten, Bryson E. Finch, Philip N. Smith

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Embryotoxicity of the oil dispersant Corexit 9500 was examined using fertilized mallard duck eggs. Corexit 9500 was topically applied below the air cell to eggs in volumes ranging from 0 to 100 lL on day 3 of incubation. The highest incidence of mortality occurred at developmental stage 4, one day post-Corexit 9500 application. Hatching success was significantly decreased among eggs treated with ≥20 μL of Corexit 9500 as compared to controls (P ≤ 0.047). No egg treated with ≥40 μL successfully hatched. The application volume resulting in 50% mortality (corrected for control survival) was determined to be 15.5 μL. Developmental stage at embryo death was also significantly decreased compared to controls in eggs exposed to 40 μL (P = 0.0042) and above.

Original languageEnglish
Pages (from-to)662-666
Number of pages5
Issue number3
StatePublished - Apr 2012


  • Anas platyrhynchos
  • Corexit 9500
  • Dispersant
  • Mallard duck
  • Oil spill


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